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## Homework Statement

Find the centre of mass of solid cone.

## Homework Equations

$$y_{cm}=\frac{1}{M}\int_0^Hydm$$

## The Attempt at a Solution

First I took thin disks. I got the answer when I assumed its thickness to be dy but then dysecθ would be more accurate if half angle of cone is θ since dysecθ gives the length of the slanted part, while dy would give a cylinder.

Now I get wrong answer.